Sources told Fox and The Arizona Republic that the D-backs would have received a "substantial" package of young players in exchange for Upton. CBSSports.com's Scott Miller reported that Arizona would have gotten shortstop prospect Nick Franklin, major league relievers Charlie Furbush and Steven Pryor, and one of the M's top starting pitching prospects: Danny Hultzen, James Paxton or Taijuan Walker.

The 25-year-old Upton fell out of favor in Arizona last year, although the D-backs' front office for months has sent mixed signals about his availability. Miller quoted a source as saying Arizona will eventually move Upton.

Seattle has been among the most aggressive suitors for Upton, along with the Texas Rangers and Atlanta Braves, according to Fox. Evan P. Grant of The Dallas Morning News reported that the Rangers likely won't pursue Upton further. Grant reported Texas made an offer Thursday before Arizona turned to Seattle. USA Today's Bob Nightengale reported that the Rangers felt Arizona's asking price was "too steep."

The Braves signed Upton's brother B.J. in the offseason. B.J. Upton has said he would like to play alongside Justin at some point in their careers. The Atlanta Journal-Constitution speculates the asking prices for Justin might have dropped now that the Diamondbacks seemingly are losing trade partners.

Arizona has six starting outfield candidates after signing free agent Cody Ross to a three-year contract this offseason. Recent reports said D-backs left fielder Jason Kubel is also a trade candidate.